Potion tipped arrows in multiplayer don't show their potion effects to other players after the arrow had landed in the ground.
Steps to reproduce
Host a local multiplayer world.
Shot a potion tipped arrow at the ground.
The potion tipped arrow will show effects to the host, but everyone else will see a regular arrow with no effects. The potion effects should be seen by everyone.
After testing, it looks like the host is the only one who can see the arrow effects/colors.